Abstract
The influence of the anisotropic exchange interaction on the phase states of a non-Heisenberg ferromagnet with a magnetic-ion spin S = 1 is studied. It is shown that, depending on the relationships between the parameters of anisotropic exchange interaction and their signs, either a biaxial non-Heisenberg magnet or an Ising magnet are realized in the system. Dynamic properties of the system near orientational phase transitions and transitions in the absolute value of the magnetic moment are studied. Phase diagrams of the system for different relationships between constitutive parameters are plotted.
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